/*
 * Copyright 2005 Sascha Weinreuter
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.intellij.lang.xpath.psi;

import com.intellij.openapi.util.text.StringUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

public interface XPathNodeTest extends XPathElement, QNameElement {
    enum PrincipalType {
        ELEMENT, ATTRIBUTE, NAMESPACE, UNKNOWN;

        public String getType() {
            return StringUtil.toLowerCase(name());
        }
    }

    @NotNull
    XPathStep getStep();

    @NotNull
    PrincipalType getPrincipalType();

    boolean isNameTest();

    @Override
    @Nullable
    PrefixedName getQName();
}
